Cardio Intro Slides Flashcards
What is the most common type of heart disease?
CAD
The heart is a ___ pump that drives the blood into two ____ and _____ circuits
dual, serial, closed
Flow is _______ because of flap valves
unidirectional
Where does the heart lie in the body?
2nd and 6th ribs
T5 and T8
What is the skeleton of the heart? What are their 3 functions?
A set of connected rings that serve as a semi-rigid support for the heart valves and for the attachement of cardiac muscle. They also serve as an electrical barrier b/w atria and ventricle
2 AV valves
Tricuspid - b/w right atria and right V
Bicuspid - b/w left a and left ventricle
Semilunar valves
Pulmonary valve - b/w RV and PT
Aortic valve - b/w LV and aorta
2 layers of the pericardium
- Loose fitting inextensible fibrous sac that surrounds the heart and is attached to the great vessels
- A serous membrane that lines the fibrous sac (parietal) and covers the heart (visceral) (reduces friction)
What is the function of the pericardium? 5
- maintain position
- Seperation from surrounding tissues
- Protection against ventricular dilation
- Maintenance of low transmral pressures
- facilitates ventricular independence
Pressure def
amount of force acting per unit area
_____ blood flow results from ___ _____ generated from the _____ action of the heart
tissue, ddriving pressure, pumping
How is individual tissue blood flow determined?
By driving pressure across a variable resistance
Darcys law
Change in Pressure = Flow x R
Poiseuille’s Law
R = 8nL/pir^4
What side of the hear is thicker?
Left and ventricles (more than A)
